// 商品定价管理模块

class ProductPricingManager {
  constructor(options = {}) {
    this.apiBaseUrl = options.apiBaseUrl || 'http://localhost:3000';
    
    // 默认商品配置
    this.products = [
      { id: 'vip-matting', name: 'VIP抠图', desc: '使用VIP服务进行图片抠图', price: 0 },
      { id: 'ai-generate', name: 'AI生图', desc: '使用AI生成图片', price: 0 }
    ];
    
    this.init();
  }

  init() {
    this.bindEvents();
    this.loadSettings();
  }

  bindEvents() {
    const productList = document.getElementById('productList');
    if (productList) {
      productList.addEventListener('input', (e) => {
        if (e.target.classList.contains('price-input')) {
          const productId = e.target.dataset.productId;
          const confirmBtn = e.target.closest('.product-item').querySelector('.btn-confirm');
          if (confirmBtn) {
            confirmBtn.classList.add('show');
          }
        }
      });

      productList.addEventListener('click', (e) => {
        if (e.target.closest('.btn-confirm')) {
          const button = e.target.closest('.btn-confirm');
          const productId = button.dataset.productId;
          this.saveProduct(productId);
        }
      });
    }
  }

  async loadSettings() {
    try {
      const response = await fetch(`${this.apiBaseUrl}/api/admin/product-pricing/settings`);
      if (response.ok) {
        const result = await response.json();
        if (result.success && result.products) {
          // 更新产品价格，保持默认产品结构
          result.products.forEach(serverProduct => {
            const localProduct = this.products.find(p => p.id === serverProduct.id);
            if (localProduct) {
              localProduct.price = serverProduct.price || 0;
            }
          });
        }
      }
    } catch (error) {
      console.log('[ProductPricingManager] 使用默认设置');
    }
    
    this.render();
  }

  render() {
    const list = document.getElementById('productList');
    if (!list) return;

    list.innerHTML = this.products.map(product => `
      <div class="product-item" data-product-id="${product.id}">
        <div class="product-info">
          <div class="product-name">${product.name}</div>
          <div class="product-desc">${product.desc}</div>
        </div>
        <div class="product-price">
          <span class="price-label">价格</span>
          <div class="price-input-wrapper">
            <input type="text" class="price-input" value="${product.price}" 
                   data-product-id="${product.id}" 
                   data-original="${product.price}">
            <span class="price-unit">Ani币</span>
          </div>
          <button class="btn-confirm" data-product-id="${product.id}" title="确认修改">✓</button>
        </div>
      </div>
    `).join('');
  }

  async saveProduct(productId) {
    const product = this.products.find(p => p.id === productId);
    if (!product) return;

    const input = document.querySelector(`.price-input[data-product-id="${productId}"]`);
    if (!input) return;

    const newPrice = parseFloat(input.value);
    if (isNaN(newPrice) || newPrice < 0) {
      this.showMessage('价格必须是大于等于0的数字', 'error');
      return;
    }

    const originalPrice = parseFloat(input.dataset.original);
    if (newPrice === originalPrice) {
      const confirmBtn = input.closest('.product-item').querySelector('.btn-confirm');
      if (confirmBtn) {
        confirmBtn.classList.remove('show');
      }
      return;
    }

    try {
      const response = await fetch(`${this.apiBaseUrl}/api/admin/product-pricing/settings`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          productId: productId,
          price: newPrice
        })
      });

      const result = await response.json();
      if (result.success) {
        product.price = newPrice;
        input.dataset.original = newPrice.toString();
        const confirmBtn = input.closest('.product-item').querySelector('.btn-confirm');
        if (confirmBtn) {
          confirmBtn.classList.remove('show');
        }
        this.showMessage('价格更新成功', 'success');
      } else {
        this.showMessage(result.message || '保存失败', 'error');
      }
    } catch (error) {
      console.error('[ProductPricingManager] 保存失败:', error);
      this.showMessage('保存失败，请稍后重试', 'error');
    }
  }

  showMessage(message, type) {
    const msgBox = document.getElementById('msgBox');
    if (msgBox) {
      msgBox.textContent = message;
      msgBox.className = `msg ${type}`;
      setTimeout(() => {
        msgBox.className = 'msg';
      }, 3000);
    }
  }
}